Phase-transformable metal-organic polyhedra for membrane processing and switchable gas separation

Po-Chun Han, Chia-Hui Chuang, Shang-Wei Lin, Xiangmei Xiang, Zaoming Wang (), Mako Kuzumoto, Shun Tokuda, Tomoki Tateishi, Alexandre Legrand, Min Ying Tsang, Hsiao-Ching Yang, Kevin C.-W. Wu (), Kenji Urayama, Dun-Yen Kang () and Shuhei Furukawa ()
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Po-Chun Han: Kyoto University, Yoshida, Sakyo-ku
Chia-Hui Chuang: National Taiwan University
Shang-Wei Lin: Fu Jen Catholic University
Xiangmei Xiang: Kyoto University, Yoshida, Sakyo-ku
Zaoming Wang: Kyoto University, Yoshida, Sakyo-ku
Mako Kuzumoto: Kyoto University, Katsura, Nishikyo-ku
Shun Tokuda: Kyoto University, Yoshida, Sakyo-ku
Tomoki Tateishi: Kyoto University, Yoshida, Sakyo-ku
Alexandre Legrand: Kyoto University, Yoshida, Sakyo-ku
Min Ying Tsang: Kyoto University, Yoshida, Sakyo-ku
Hsiao-Ching Yang: Fu Jen Catholic University
Kevin C.-W. Wu: National Taiwan University
Kenji Urayama: Kyoto University, Katsura, Nishikyo-ku
Dun-Yen Kang: National Taiwan University
Shuhei Furukawa: Kyoto University, Yoshida, Sakyo-ku

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract The capability of materials to interconvert between different phases provides more possibilities for controlling materials’ properties without additional chemical modification. The study of state-changing microporous materials just emerged and mainly involves the liquefication or amorphization of solid adsorbents into liquid or glass phases by adding non-porous components or sacrificing their porosity. The material featuring reversible phases with maintained porosity is, however, still challenging. Here, we synthesize metal-organic polyhedra (MOPs) that interconvert between the liquid-glass-crystal phases. The modular synthetic approach is applied to integrate the core MOP cavity that provides permanent microporosity with tethered polymers that dictate the phase transition. We showcase the processability of this material by fabricating a gas separation membrane featuring tunable permeability and selectivity by switching the state. Compared to most conventional porous membranes, the liquid MOP membrane particularly shows the selectivity for CO2 over H2 with enhanced permeability.

Date: 2024
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DOI: 10.1038/s41467-024-53560-3

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